Hate to sound like a "smart A__" but have you tried Sears? Ted Williams was a Sears brand. AND sometimes they have parts piled up in warehouses... Try calling a couple big stores in big cities and ask. And, often, they are still selling at a price from 5? 10? 20? years ago which you cannot touch today with someone knows what is going on.
From there, I have always hit the hard copy of Shotgun News and the dealers who advertise there. No telling what one of them might turn up.
c). With all the "trade restrictions" down, you might try to find and contact Voere. No telling what they have for a parts depot. Might have a depot in USA. Import could be a pain, but...
d). Last, you have the thing made. Great metal workers love this kind of challange. And if they use brass or some other metal, it just might last a bit longer. LUCK.